Morrison junior club proud of his West Ham success
"You could always control the football side of things in his life," Jamieson told the Manchester Evening News.
"He loved the game so much you could just say to him 'no football this week for you, Ravel, if you keep on doing that' and he'd knuckle down.
"He had connections to Wythenshawe and Longsight, he knocked around with street kids so he had to be mentally, as well as physically, tough.
"You haven't seen the best of him yet, he's maturing all the time. Deep down he's a nice lad. We're proud of him."